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linux-sg2042/drivers/scsi/mpt3sas
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Calvin Owens 5ec8a1753b mpt3sas: Don't overreach ioc->reply_post[] during initialization 
In _base_make_ioc_operational(), we walk ioc->reply_queue_list and pull
a pointer out of successive elements of ioc->reply_post[] for each entry
in that list if RDPQ is enabled.

Since the code pulls the pointer for the next iteration at the bottom of
the loop, it triggers the a KASAN dump on the final iteration:

    BUG: KASAN: slab-out-of-bounds in _base_make_ioc_operational+0x47b7/0x47e0 [mpt3sas] at addr ffff880754816ab0
    Read of size 8 by task modprobe/305
    <snip>
    Call Trace:
     [<ffffffff81dfc591>] dump_stack+0x4d/0x6c
     [<ffffffff814c9689>] print_trailer+0xf9/0x150
     [<ffffffff814ceda4>] object_err+0x34/0x40
     [<ffffffff814d1231>] kasan_report_error+0x221/0x530
     [<ffffffff814d1673>] __asan_report_load8_noabort+0x43/0x50
     [<ffffffffa0043637>] _base_make_ioc_operational+0x47b7/0x47e0 [mpt3sas]
     [<ffffffffa0049a51>] mpt3sas_base_attach+0x1991/0x2120 [mpt3sas]
     [<ffffffffa0053c93>] _scsih_probe+0xeb3/0x16b0 [mpt3sas]
     [<ffffffff81ebd047>] local_pci_probe+0xc7/0x170
     [<ffffffff81ebf2cf>] pci_device_probe+0x20f/0x290
     [<ffffffff820d50cd>] really_probe+0x17d/0x600
     [<ffffffff820d56a3>] __driver_attach+0x153/0x190
     [<ffffffff820cffac>] bus_for_each_dev+0x11c/0x1a0
     [<ffffffff820d421d>] driver_attach+0x3d/0x50
     [<ffffffff820d378a>] bus_add_driver+0x44a/0x5f0
     [<ffffffff820d666c>] driver_register+0x18c/0x3b0
     [<ffffffff81ebcb76>] __pci_register_driver+0x156/0x200
     [<ffffffffa00c8135>] _mpt3sas_init+0x135/0x1000 [mpt3sas]
     [<ffffffff81000423>] do_one_initcall+0x113/0x2b0
     [<ffffffff813caa5a>] do_init_module+0x1d0/0x4d8
     [<ffffffff81273909>] load_module+0x6729/0x8dc0
     [<ffffffff81276123>] SYSC_init_module+0x183/0x1a0
     [<ffffffff8127625e>] SyS_init_module+0xe/0x10
     [<ffffffff828fe7d7>] entry_SYSCALL_64_fastpath+0x12/0x6a

Fix this by pulling the value at the beginning of the loop.

Signed-off-by: Calvin Owens <calvinowens@fb.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Jens Axboe <axboe@fb.com>
Acked-by: Chaitra Basappa <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 		2016-03-23 16:33:09 -04:00
..
mpi mpt3sas: Updated MPI Header to 2.00.42 2016-02-23 21:27:02 -05:00
Kconfig mpt3sas: fix Kconfig dependency problem for mpt2sas back compatibility 2015-12-03 09:31:23 -08:00
Makefile mpt3sas: Single driver module which supports both SAS 2.0 & SAS 3.0 HBAs 2015-11-11 19:50:11 -05:00
mpt3sas_base.c mpt3sas: Don't overreach ioc->reply_post[] during initialization 2016-03-23 16:33:09 -04:00
mpt3sas_base.h mpt3sas: Updating mpt3sas driver version to 12.100.00.00 2016-02-23 21:27:02 -05:00
mpt3sas_config.c mpt3sas: Single driver module which supports both SAS 2.0 & SAS 3.0 HBAs 2015-11-11 19:50:11 -05:00
mpt3sas_ctl.c mpt3sas: Fix for Asynchronous completion of timedout IO and task abort of timedout IO. 2016-02-23 21:27:02 -05:00
mpt3sas_ctl.h mpt3sas: Ported WarpDrive product SSS6200 support 2015-11-11 18:56:10 -05:00
mpt3sas_debug.h mpt2sas, mpt3sas: Remove SCSI_MPTXSAS_LOGGING entry from Kconfig 2015-11-11 18:31:14 -05:00
mpt3sas_scsih.c mpt3sas: Fix for Asynchronous completion of timedout IO and task abort of timedout IO. 2016-02-23 21:27:02 -05:00
mpt3sas_transport.c mpt3sas: Fix static analyzer(coverity) tool identified defects 2016-02-23 21:27:02 -05:00
mpt3sas_trigger_diag.c mpt2sas, mpt3sas: Update attribution language to Avago 2015-01-13 16:27:27 +01:00
mpt3sas_trigger_diag.h mpt2sas, mpt3sas: Update attribution language to Avago 2015-01-13 16:27:27 +01:00
mpt3sas_warpdrive.c mpt3sas: Single driver module which supports both SAS 2.0 & SAS 3.0 HBAs 2015-11-11 19:50:11 -05:00